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A305038 Number of n X 6 0..1 arrays with every element unequal to 0, 1, 2, 6 or 7 king-move adjacent elements, with upper left element zero. 1
32, 13, 23, 61, 109, 362, 1359, 3503, 9721, 31745, 92958, 264320, 801379, 2396646, 6995135, 20759698, 61886282, 182695112, 540411495, 1604584471, 4752248516, 14064522112, 41687159362, 123524127876, 365802987085, 1083702812242 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,1
COMMENTS
Column 6 of A305040.
LINKS
FORMULA
Empirical: a(n) = a(n-1) +a(n-2) +14*a(n-3) +6*a(n-4) -4*a(n-5) -29*a(n-6) -16*a(n-7) +2*a(n-8) +a(n-9) +5*a(n-10) +3*a(n-11) +a(n-12) +3*a(n-13) for n > 19.
EXAMPLE
Some solutions for n=5
..0..1..1..1..1..1. .0..0..0..0..0..0. .0..0..0..0..0..1. .0..0..0..0..0..0
..1..0..1..1..1..1. .0..0..0..1..0..0. .0..0..0..0..1..0. .0..0..0..0..0..0
..1..1..0..1..1..1. .0..0..1..0..0..0. .0..0..0..1..0..0. .0..0..0..1..0..0
..1..1..1..0..1..1. .0..0..0..0..0..0. .0..0..0..0..0..0. .0..0..0..0..1..0
..1..1..1..1..1..1. .0..0..0..0..0..0. .0..0..0..0..0..0. .0..0..0..0..0..1
CROSSREFS
Cf. A305040.
Sequence in context: A079809 A070629 A304228 * A305584 A316691 A275470
KEYWORD
nonn
AUTHOR
R. H. Hardin, May 24 2018
STATUS
approved

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Last modified May 22 20:45 EDT 2024. Contains 372758 sequences. (Running on oeis4.)